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videoscale: Add support for 16 bit grayscale in native endianness

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This commit is contained in:
Sebastian Dröge 2009-05-26 15:23:45 +02:00
parent 9d02d1d8ab
commit 2e5c946501
7 changed files with 354 additions and 1 deletions
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22
gst/videoscale/gstvideoscale.c
View file

@ -106,6 +106,12 @@ static GstStaticCaps gst_video_scale_format_caps[] = {
"bpp = 8, "
"depth = 8, "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE ", " "framerate = " GST_VIDEO_FPS_RANGE),
GST_STATIC_CAPS ("video/x-raw-gray, "
"bpp = 16, "
"depth = 16, "
"endianness = BYTE_ORDER, "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE ", " "framerate = " GST_VIDEO_FPS_RANGE)
};
@ -131,7 +137,8 @@ enum
GST_VIDEO_SCALE_YV12,
GST_VIDEO_SCALE_RGB565,
GST_VIDEO_SCALE_RGB555,
GST_VIDEO_SCALE_GRAY8
GST_VIDEO_SCALE_GRAY8,
GST_VIDEO_SCALE_GRAY16
};
#define GST_TYPE_VIDEO_SCALE_METHOD (gst_video_scale_method_get_type())
@ -445,6 +452,10 @@ gst_video_scale_prepare_size (GstVideoScale * videoscale, gint format,
img->stride = GST_ROUND_UP_4 (img->width);
*size = img->stride * img->height;
break;
case GST_VIDEO_SCALE_GRAY16:
img->stride = GST_ROUND_UP_4 (img->width * 2);
*size = img->stride * img->height;
break;
case GST_VIDEO_SCALE_I420:
case GST_VIDEO_SCALE_YV12:
{
@ -768,6 +779,9 @@ gst_video_scale_transform (GstBaseTransform * trans, GstBuffer * in,
case GST_VIDEO_SCALE_GRAY8:
vs_image_scale_nearest_Y (dest, src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_GRAY16:
vs_image_scale_nearest_Y16 (dest, src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_I420:
case GST_VIDEO_SCALE_YV12:
vs_image_scale_nearest_Y (dest, src, videoscale->tmp_buf);
@ -814,6 +828,9 @@ gst_video_scale_transform (GstBaseTransform * trans, GstBuffer * in,
case GST_VIDEO_SCALE_GRAY8:
vs_image_scale_linear_Y (dest, src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_GRAY16:
vs_image_scale_linear_Y16 (dest, src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_I420:
case GST_VIDEO_SCALE_YV12:
vs_image_scale_linear_Y (dest, src, videoscale->tmp_buf);
@ -860,6 +877,9 @@ gst_video_scale_transform (GstBaseTransform * trans, GstBuffer * in,
case GST_VIDEO_SCALE_GRAY8:
vs_image_scale_4tap_Y (dest, src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_GRAY16:
vs_image_scale_4tap_Y16 (dest, src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_I420:
case GST_VIDEO_SCALE_YV12:
vs_image_scale_4tap_Y (dest, src, videoscale->tmp_buf);

117
gst/videoscale/vs_4tap.c
View file

@ -209,6 +209,123 @@ vs_image_scale_4tap_Y (const VSImage * dest, const VSImage * src,
}
}
void
vs_scanline_resample_4tap_Y16 (uint8_t * dest, uint8_t * src,
int n, int src_width, int *xacc, int increment)
{
int i;
int j;
int acc;
int x;
int y;
uint16_t *d = (uint16_t *) dest, *s = (uint16_t *) src;
acc = *xacc;
for (i = 0; i < n; i++) {
j = acc >> 16;
x = (acc & 0xff00) >> 8;
if (j - 1 >= 0 && j + 2 < src_width) {
y = vs_4tap_taps[x][0] * s[MAX (j - 1, 0)];
y += vs_4tap_taps[x][1] * s[j];
y += vs_4tap_taps[x][2] * s[j + 1];
y += vs_4tap_taps[x][3] * s[j + 2];
} else {
y = vs_4tap_taps[x][0] * s[CLAMP (j - 1, 0, src_width - 1)];
y += vs_4tap_taps[x][1] * s[CLAMP (j, 0, src_width - 1)];
y += vs_4tap_taps[x][2] * s[CLAMP (j + 1, 0, src_width - 1)];
y += vs_4tap_taps[x][3] * s[CLAMP (j + 2, 0, src_width - 1)];
}
y += (1 << (SHIFT - 1));
d[i] = CLAMP (y >> SHIFT, 0, 65535);
acc += increment;
}
*xacc = acc;
}
void
vs_scanline_merge_4tap_Y16 (uint8_t * dest, uint8_t * src1, uint8_t * src2,
uint8_t * src3, uint8_t * src4, int n, int acc)
{
int i;
int y;
int a, b, c, d;
uint16_t *de = (uint16_t *) dest, *s1 = (uint16_t *) src1;
uint16_t *s2 = (uint16_t *) src2, *s3 = (uint16_t *) src3;
uint16_t *s4 = (uint16_t *) src4;
acc = (acc >> 8) & 0xff;
a = vs_4tap_taps[acc][0];
b = vs_4tap_taps[acc][1];
c = vs_4tap_taps[acc][2];
d = vs_4tap_taps[acc][3];
for (i = 0; i < n; i++) {
y = a * s1[i];
y += b * s2[i];
y += c * s3[i];
y += d * s4[i];
y += (1 << (SHIFT - 1));
de[i] = CLAMP (y >> SHIFT, 0, 65535);
}
}
void
vs_image_scale_4tap_Y16 (const VSImage * dest, const VSImage * src,
uint8_t * tmpbuf)
{
int yacc;
int y_increment;
int x_increment;
int i;
int j;
int xacc;
int k;
if (dest->height == 1)
y_increment = 0;
else
y_increment = ((src->height - 1) << 16) / (dest->height - 1);
if (dest->width == 1)
x_increment = 0;
else
x_increment = ((src->width - 1) << 16) / (dest->width - 1);
k = 0;
for (i = 0; i < 4; i++) {
xacc = 0;
vs_scanline_resample_4tap_Y16 (tmpbuf + i * dest->stride,
src->pixels + i * src->stride, dest->width, src->width,
&xacc, x_increment);
}
yacc = 0;
for (i = 0; i < dest->height; i++) {
uint8_t *t0, *t1, *t2, *t3;
j = yacc >> 16;
while (j > k) {
k++;
if (k + 3 < src->height) {
xacc = 0;
vs_scanline_resample_4tap_Y16 (tmpbuf + ((k + 3) & 3) * dest->stride,
src->pixels + (k + 3) * src->stride,
dest->width, src->width, &xacc, x_increment);
}
}
t0 = tmpbuf + (CLAMP (j - 1, 0, src->height - 1) & 3) * dest->stride;
t1 = tmpbuf + (CLAMP (j, 0, src->height - 1) & 3) * dest->stride;
t2 = tmpbuf + (CLAMP (j + 1, 0, src->height - 1) & 3) * dest->stride;
t3 = tmpbuf + (CLAMP (j + 2, 0, src->height - 1) & 3) * dest->stride;
vs_scanline_merge_4tap_Y16 (dest->pixels + i * dest->stride,
t0, t1, t2, t3, dest->width, yacc & 0xffff);
yacc += y_increment;
}
}
void
vs_scanline_resample_4tap_RGBA (uint8_t * dest, uint8_t * src,
int n, int src_width, int *xacc, int increment)

7
gst/videoscale/vs_4tap.h
View file

@ -82,5 +82,12 @@ void vs_scanline_merge_4tap_RGB555 (uint8_t *dest, uint8_t *src1, uint8_t *src2,
void vs_image_scale_4tap_RGB555 (const VSImage * dest, const VSImage * src,
uint8_t * tmpbuf);
void vs_scanline_resample_4tap_Y16 (uint8_t *dest, uint8_t *src,
int n, int src_width, int *xacc, int increment);
void vs_scanline_merge_4tap_Y16 (uint8_t *dest, uint8_t *src1, uint8_t *src2,
uint8_t *src3, uint8_t *src4, int n, int acc);
void vs_image_scale_4tap_Y16 (const VSImage * dest, const VSImage * src,
uint8_t * tmpbuf);
#endif

130
gst/videoscale/vs_image.c
View file

@ -692,6 +692,136 @@ vs_image_scale_linear_Y (const VSImage * dest, const VSImage * src,
}
}
void
vs_image_scale_nearest_Y16 (const VSImage * dest, const VSImage * src,
uint8_t * tmpbuf)
{
int acc;
int y_increment;
int x_increment;
int i;
int j;
int x;
int xacc;
if (dest->height == 1)
y_increment = 0;
else
y_increment = ((src->height - 1) << 16) / (dest->height - 1);
if (dest->width == 1)
x_increment = 0;
else
x_increment = ((src->width - 1) << 16) / (dest->width - 1);
acc = 0;
for (i = 0; i < dest->height; i++) {
j = acc >> 16;
x = acc & 0xffff;
xacc = 0;
vs_scanline_resample_nearest_Y16 (dest->pixels + i * dest->stride,
src->pixels + j * src->stride, src->width, dest->width, &xacc,
x_increment);
acc += y_increment;
}
}
void
vs_image_scale_linear_Y16 (const VSImage * dest, const VSImage * src,
uint8_t * tmpbuf)
{
int acc;
int y_increment;
int x_increment;
uint8_t *tmp1;
uint8_t *tmp2;
int y1;
int y2;
int i;
int j;
int x;
int dest_size;
int xacc;
if (dest->height == 1)
y_increment = 0;
else
y_increment = ((src->height - 1) << 16) / (dest->height - 1);
if (dest->width == 1)
x_increment = 0;
else
x_increment = ((src->width - 1) << 16) / (dest->width - 1);
dest_size = 2 * dest->width;
tmp1 = tmpbuf;
tmp2 = tmpbuf + dest_size;
acc = 0;
xacc = 0;
y2 = -1;
vs_scanline_resample_linear_Y16 (tmp1, src->pixels, src->width, dest->width,
&xacc, x_increment);
y1 = 0;
for (i = 0; i < dest->height; i++) {
j = acc >> 16;
x = acc & 0xffff;
if (x == 0) {
if (j == y1) {
memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
} else if (j == y2) {
memcpy (dest->pixels + i * dest->stride, tmp2, dest_size);
} else {
xacc = 0;
vs_scanline_resample_linear_Y16 (tmp1, src->pixels + j * src->stride,
src->width, dest->width, &xacc, x_increment);
y1 = j;
memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
}
} else {
if (j == y1) {
if (j + 1 != y2) {
xacc = 0;
vs_scanline_resample_linear_Y16 (tmp2,
src->pixels + (j + 1) * src->stride, src->width, dest->width,
&xacc, x_increment);
y2 = j + 1;
}
vs_scanline_merge_linear_Y16 (dest->pixels + i * dest->stride,
tmp1, tmp2, dest->width, x);
} else if (j == y2) {
if (j + 1 != y1) {
xacc = 0;
vs_scanline_resample_linear_Y16 (tmp1,
src->pixels + (j + 1) * src->stride, src->width, dest->width,
&xacc, x_increment);
y1 = j + 1;
}
vs_scanline_merge_linear_Y16 (dest->pixels + i * dest->stride,
tmp2, tmp1, dest->width, x);
} else {
xacc = 0;
vs_scanline_resample_linear_Y16 (tmp1, src->pixels + j * src->stride,
src->width, dest->width, &xacc, x_increment);
y1 = j;
xacc = 0;
vs_scanline_resample_linear_Y16 (tmp2,
src->pixels + (j + 1) * src->stride, src->width, dest->width, &xacc,
x_increment);
y2 = (j + 1);
vs_scanline_merge_linear_Y16 (dest->pixels + i * dest->stride,
tmp1, tmp2, dest->width, x);
}
}
acc += y_increment;
}
}
/* RGB565 */
void

5
gst/videoscale/vs_image.h
View file

@ -74,5 +74,10 @@ void vs_image_scale_nearest_RGB555 (const VSImage *dest, const VSImage *src,
void vs_image_scale_linear_RGB555 (const VSImage *dest, const VSImage *src,
uint8_t *tmpbuf);
void vs_image_scale_nearest_Y16 (const VSImage *dest, const VSImage *src,
uint8_t *tmpbuf);
void vs_image_scale_linear_Y16 (const VSImage *dest, const VSImage *src,
uint8_t *tmpbuf);
#endif

70
gst/videoscale/vs_scanline.c
View file

@ -95,6 +95,76 @@ vs_scanline_merge_linear_Y (uint8_t * dest, uint8_t * src1, uint8_t * src2,
oil_merge_linear_u8 (dest, src1, src2, &value, n);
}
void
vs_scanline_downsample_Y16 (uint8_t * dest, uint8_t * src, int n)
{
int i;
uint16_t *d = (uint16_t *) dest, *s = (uint16_t *) src;
for (i = 0; i < n; i++) {
d[i] = (s[i * 2] + s[i * 2 + 1]) / 2;
}
}
void
vs_scanline_resample_nearest_Y16 (uint8_t * dest, uint8_t * src, int src_width,
int n, int *accumulator, int increment)
{
int acc = *accumulator;
int i;
int j;
int x;
uint16_t *d = (uint16_t *) dest, *s = (uint16_t *) src;
for (i = 0; i < n; i++) {
j = acc >> 16;
x = acc & 0xffff;
d[i] = (x < 32768 || j + 1 >= src_width) ? s[j] : s[j + 1];
acc += increment;
}
*accumulator = acc;
}
#include <glib.h>
void
vs_scanline_resample_linear_Y16 (uint8_t * dest, uint8_t * src, int src_width,
int n, int *accumulator, int increment)
{
int acc = *accumulator;
int i;
int j;
int x;
uint16_t *d = (uint16_t *) dest, *s = (uint16_t *) src;
for (i = 0; i < n; i++) {
j = acc >> 16;
x = acc & 0xffff;
if (j + 1 < src_width)
d[i] = (s[j] * (65536 - x) + s[j + 1] * x) >> 16;
else
d[i] = s[j];
acc += increment;
}
*accumulator = acc;
}
void
vs_scanline_merge_linear_Y16 (uint8_t * dest, uint8_t * src1, uint8_t * src2,
int n, int x)
{
int i;
uint16_t *d = (uint16_t *) dest, *s1 = (uint16_t *) src1, *s2 =
(uint16_t *) src2;
for (i = 0; i < n; i++) {
d[i] = (s1[i] * (65536 - x) + s2[i] * x) >> 16;
}
}
/* RGBA */

4
gst/videoscale/vs_scanline.h
View file

@ -65,6 +65,10 @@ void vs_scanline_resample_nearest_RGB555 (uint8_t *dest, uint8_t *src, int src_w
void vs_scanline_resample_linear_RGB555 (uint8_t *dest, uint8_t *src, int src_width, int n, int *accumulator, int increment);
void vs_scanline_merge_linear_RGB555 (uint8_t *dest, uint8_t *src1, uint8_t *src2, int n, int x);
void vs_scanline_downsample_Y16 (uint8_t *dest, uint8_t *src, int n);
void vs_scanline_resample_nearest_Y16 (uint8_t *dest, uint8_t *src, int n, int src_width, int *accumulator, int increment);
void vs_scanline_resample_linear_Y16 (uint8_t *dest, uint8_t *src, int n, int src_width, int *accumulator, int increment);
void vs_scanline_merge_linear_Y16 (uint8_t *dest, uint8_t *src1, uint8_t *src2, int n, int x);
#endif